Take-up mechanism for looms



April 1939- J. J. ROSENTHAL ET AL 2,154,235

TAKE-UP MECHANISM FOR LOOMS Filed Oct. 15, 1938 INVENTORS 7 41,11 JIFare-n Illa! Walter W ML ATTORNEY.

Patented Apr; 11, 1939 UNITED STATES PATENT OFFICE TAKE UP MECHANISM FOR LOOMS Joseph J. Rosenthal and Walter Waskiewicz, Paterson, N. J.

Application October 15, 1938, Serial No. 235,268 3 Claims. (01.139-316) -In take-up mechanisms for looms, in addition "to'the usual clutch to disconnectively connect the driven geared system including the take-up roll with'the driver so that said roll may be permitted,'on disestablishing the clutch, to rotate backward for producing slack in the sheet of warp and woven fabric, it is usual also to providemeans to limit the letting-back to a few picks which comprises a pawl device engaged in with the ratchet and in some way having its movement in response to the letting-back action limited, as by being pivoted to a'carrier having limited movement'in the letting-back direction.

To let back to the prescribed limit the clutch l5 is'simply disestablished. But if the weaver requires to let back the sheet beyond the prescribed limit difficulties are met with, thus: Force must be applied at three points, to wit, to theclutch shifter to release the clutch, which is usually done by the weavers foot; to the pawl device to disengage it from the ratchet, as by 'one hand; and to the geared system in order to free said device if it clings to the ratchet and also to controlthe rotation of the system when released, which is done by the other hand.

"Thus the operation is troublesome if not difli- 'cult to accomplish, requiring application of force as well by the foot as by both hands, and since the gearing of the system and the pawl device are of course greased, the weavers hand becomes badly soiled, and besides there is also the hazard of his hand being caught in or cut by the gearing. J I

According to our invention herein set forth, when it is necessary to let back the sheet more than to the indicated prescribed limit the weaver has to use only his hands, one to retract the pawl device and disestablish the clutch and the other to control the ensuing re-rotation of the geared system, his foot not being required to be used at all at this time; and, further, the said control is accomplished by providing said system with a hand-wheel which is removed from greasy parts of the mechanism and within convenient reach of the weaver. The arrangement and construction are further such that when the lettingback is to be effected only to the prescribed limit this is done in the usual way, without interference with the means by which the weaver effects retraction of the pawl device and disestablishing of the clutch when the letting back is to be effected beyond said limit.

In the drawing: Fig. 1 shows in front elevation, partly in broken outline, a take-up mechanism equipped with the present improvements;

Fig. 2 is a side elevation of what is shown by full lines in Fig. 1,'with the hand-wheel removed and a. part of the fixed structure broken away; 5

' and unit is as usual free to rotate on a shaft 6 journaled in a bracket 1 fast to the loom frame-side 5 8. But according to our invention the gear and ratchet form also a unit with a sleeve 9 which is journaled on said shaft and projects inwardly from the frame-side and has aflixed to its free end a hand-wheel Ill. The structure 35-9-I0 20 forms in effect a driven clutch-member. It may be held against movement away from the side- 'frame 8 by a nut But on the shaft.

Splined on the shaft, which is suitably and constantly driven, is a driving clutch-member 25 i I, the two clutch-members having interengaging teeth l2. Member II is normally urged to maintain engagement of said teeth with each other by a spring (not shown) as usual enclosed in a housing Ha of clutch-member ll. 30

To disestablish the clutch there is the usual shifter or lever I3 fulcrumed in the bracket 1 and having a fork l3a to engagethe driving clutch-member and a depending arm I3b by which it is actuated, said arm having a concave 85 side facing the loom so as to afford a good foothold to the weaver in disconnecting the clutch; this may incidentally be actuated in the usual Way through a bar M from the filling replenishing mechanism of the loom. 40

On the sleeve 9 is freely revoluble a pawl carrier i5, which is weighted at l5a so that it tends to turn counter-clockwise, being limited in its movement by a lug I51) thereon which may engage either end of a slot lfia in an arm it which projects rigidly from a standard I1 inward of the frame-side and forming therewith what we term the fixed structure of the loom. In the pawl carrier is arranged what we term a pawldevice, here including two pawls l8 and I9, though it might be only one. The pawls are by gravity normally held engaged with the ratchet, and when the pawl I8 is disengaged from the ratchet it also causes disengagement of the pawl l9 by engagement with the latter of its lug laa.

In accordance with our invention a lever 20 is fulcrumed on the standard here with its axis parallel with that of shaft 6 and preferably above the shaft within convenient reach of the weavers hand. Pivoted to this lever and depending therefrom is a bar or link 2| to the lower end of which, belowlthe shaft, is pivoted one end of a lever 22 fulcrumed between its ends in an arm 23 projecting from the frame-side, the axis of lever 22 crossing that of shaft 6. The free end of lever 22 is bent off at 2211 and is arranged to bear against the concave side of the depending arm of the shifter l3. A lug 20a on the hand-lever 20 by abutting the link limits the downward movement of these parts. The bar or link 2| has an arm 2|a and this is suitably connected with the pawl l8 by a link 24 pivoted to said arm and passing freely through an eye |8b on pawl l8, having a head 24a below the eye.

To let back the limit prescribed by the slot lfia, the weaver. simply disestablishes the clutch by moving the shifter, as with his foot. But to let back beyond said limit he with one hand elevates lever 20, which causes disestablishing of the clutch and retraction of the pawl device from the ratchet, while with the other he grasps the hand-wheel H3 and so maintains the driven clutch-member of which it forms a part and consequently the transmission gearing and takeup roll under controlled reaction, the operation being simplified and rendered easy to perform, since he need not use his foot, and soiling or injuring his hands is entirely avoided. Since the bar or link 2| projects up from the lever 22 past the means, afforded by the pawl device, which limits re-rotation of the take-up-roll-including driven rotary system, the weaver can perform the operation, moreover, without crouching but in a merely somewhat stooping position.

So far as we are aware it is novel in this art to provide means for moving the driving clutchmember to de-clutching position and for moving the means which limits re-rotation of the driven system which projects upwardly and hence into 1. In a loom, the combination, with supporting structure, a driven take-up-roll-including train of intergeared rotary elements journaled therein, a constantly moving driving member normally engaged but movable out of engagement with an element of the train, a lever fulcrumed in said structure and movable to move the driving member out of engagement with said element, and means normally engaged with said train and limiting re-rotation thereof but movable out of engagement therewith to free the train for unlimited re-rotation, of means to move said lever and thereby the driving member out of engagement with said element and also move the firstnamed means out of engagement with said train comprising a lever fulcrumed in said structure and engaged with the first lever, an upstanding link connected with the second-named lever and operatively connected with the first-named means, and a hand-lever having the link pivoted thereto and depending therefrom, said handlever being fulcrumed in the frame and movable in an up-and-down direction.

2. In a loom, the combination, with supporting structure, of a shaft journaled therein and projecting therefrom, a take-up-roll-including train of rotary intergeared elements having one element thereof journaled on said shaft and forming a driven clutch-member, means to confine said element against movement from said structure, a driving clutch-member between said structure and element and normally clutched with the latter and revoluble with the shaft but movable thereon toward said structure clear of said element, said element including an axial sleeve projecting from said structure and a hand-grip device fast to the sleeve relatively outward of said element.

3. In a loom, the combination, with supporting structure, of a shaft journaled therein and projecting therefrom, a take-up-roll-including train of rotary intergeared elements having one element thereof journaled on the shaft and including a ratchet and an axial sleeve projecting from the ratchet and away from said structure, a pawlcarrier journaled on the sleeve outward of the ratchet and having its movement around the axis of the sleeve limited by said structure, a pawldevice carried by the pawl-carrier and normally held engaged with but disengageable from the ratchet, and a hand-grip device fast to the sleeve relatively outward of the pawl-carrier.

' JOSEPH J. ROSENTI-IAL.

WALTER. WASKIEWICZ. 

